I modified the INF file, and GeForce GTX 1660 Ti displayed Code 43 error on Windows 10 version 1607 Test Mode.
GeForce RTX GPUs support Windows 7, 8, 8.1, and Windows 10 version 1709 or later. But Quadro RTX GPUs support 1607.
Now I am sure the installation is not blocked by the INF file.
The driver for NVIDIA USB Type-C Port Policy Controller can be found in PPC folder.
I also checked the INF file in AMD Radeon software 19.7.1, and I think Radeon RX 5700 GPUs may support 1607.